How long would I need to take voice lessons?

The first time I performed live I was thirteen and I had no training, and no experience- BUT, I did very well and it was a good experience. Get on stage, don't " wait until you're good". It doesn't really depend on the vocal lessons, it depends on how much you are willing to dedicate yourself and practice. So, get on stage, and just keep practicing. Definitely get the voice lessons to get you on the right track!